228218293 has 2 divisors, whose sum is σ = 228218294. Its totient is φ = 228218292.

The previous prime is 228218269. The next prime is 228218317. The reversal of 228218293 is 392812822.

It is a balanced prime because it is at equal distance from previous prime (228218269) and next prime (228218317).

It can be written as a sum of positive squares in only one way, i.e., 201157489 + 27060804 = 14183^2 + 5202^2 .

It is a cyclic number.

It is not a de Polignac number, because 228218293 - 2¹⁷ = 228087221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228218203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114109146 + 114109147.

It is an arithmetic number, because the mean of its divisors is an integer number (114109147).

Almost surely, 2^228218293 is an apocalyptic number.

It is an amenable number.

228218293 is a deficient number, since it is larger than the sum of its proper divisors (1).

228218293 is an equidigital number, since it uses as much as digits as its factorization.

228218293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 37.

The square root of 228218293 is about 15106.8955447504. The cubic root of 228218293 is about 611.1063796352.

The spelling of 228218293 in words is "two hundred twenty-eight million, two hundred eighteen thousand, two hundred ninety-three".